Major champion, Adam Scott carded a final round of one-over-par 71 in tough conditions to tie for sixth alongside American Chan Kim on two-over-par 282, 12 shots behind young gun Taiga Semikawa who survived a late scare to become the Championship's only second amateur winner in its 87-year history.
Scott, the highest-ranked player in this week's field at world number 32, came in joint-fifth the last time he was in action in 2019.
With another tied-seventh result coming from the 2015 edition, the 42-year-old Australian now has three top-10 finishes from a total of six Japan Open appearances since debuting in 2014.
Although disappointed for not being able to mount a serious title challenge, Scott is taking plenty of positives from what he described as a "great week and fantastic tournament".
"I had a great week, it's been a fantastic tournament but of course, when you don't win, it's all the frustrations, especially on a very difficult golf course," said the 2013 Masters champion.
"I'm disappointed with my result, but I saw a lot of good things in my game. On this incredibly tough golf course, I think my standard of play was nearly very good.
"When you're playing at the very top level like this, it's a very fine line between 10th place and challenging for the win.
"There are positives to take, I feel good about my game."
Even with the 31 victories he accomplished across the globe, Scott admitted that he simply could not conquer the Sanko Golf Club's Japan Course.